Is there a way to log or display a custom message when reboot is blocked ?

[ghost]

To help the operator get used to reboot-guard and to prevent negative perception, it would be quite useful to be able to display a custom message like:

[root]# systemctl reboot
Failed to issue method call: Operation refused, unit reboot.target may be requested by dependency only. This service is blocked by reboot-guard ...etc..etc...etc.